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Recent content by clismi

  1. C

    5V Rectifier Intermittent Due to Heat?

    More info The filter capacitor on the 5V power supply had high leakage current. I reformed it on a Sencore LC53 and the leakage test looked good after that. Now the oscilloscope's 5V power supply stays on for a long time. The output of the rectifier has 60 cycle ripple, which means one side...
  2. C

    5V Rectifier Intermittent Due to Heat?

    5V Power Supply Measurements Those are some interesting ideas. Thanks for the help. An interesting development--the more this scope is on, the better it works. That sounds like an electrolytic capacitor to me. As for the 5 V supply, when it is working, I measure 4.93 V. The manual says it...
  3. C

    5V Rectifier Intermittent Due to Heat?

    I'm repairing a Tektronix 468 oscilloscope and believe I have an intermittent 5V bridge rectifier. After the scope is off for days or hours and then powered up, I sometimes have the voltage at the output of the rectifier and sometimes I don't, but I always have the correct rectifier input...
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